Here are some graphs to follow up on this Monkey Cage post.

DW-Nominate_SD

Bailey_SD---

UPDATE (Sept 12, 2014)

Here's another graph of the Bailey data, to illustrate the narrowing and moderate cross-time shift of the congressional GOP and northern Democratic ideal point estimates, but a more dramatic leftward cross-time shift in the congressional southern Democratic ideal point estimates.

bailey_sort

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UPDATE (Sept 13, 2014)

Here are the do files I used to create a database with Bailey scores and state and party codes for each case (House, Senate). Here is a description of the process that I used to create the do files.

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